Benihana Ginger Sauce

1 yellow onion
2 tablespoons peeled and grated fresh ginger

(or 1/4 teaspoon ground ginger)
1/4 cup fresh lemon juice
1/2 cup white vinegar
1 cup soy sauce

Chop onion and grate ginger on a cheese grater.

Place all ingredients in a food processor and pulse until well blended.

Refrigerate.